CA1066164A - Backflow prevention apparatus - Google Patents

Backflow prevention apparatus

Info

Publication number
CA1066164A
CA1066164A CA212,300A CA212300A CA1066164A CA 1066164 A CA1066164 A CA 1066164A CA 212300 A CA212300 A CA 212300A CA 1066164 A CA1066164 A CA 1066164A
Authority
CA
Canada
Prior art keywords
valve
pressure
chamber
poppet
check valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA212,300A
Other languages
English (en)
French (fr)
Other versions
CA212300S (en
Inventor
Richard E. Veit
David E. Griswold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Griswold Controls LLC
Original Assignee
Griswold Controls LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Griswold Controls LLC filed Critical Griswold Controls LLC
Priority to CA327,334A priority Critical patent/CA1090675A/en
Application granted granted Critical
Publication of CA1066164A publication Critical patent/CA1066164A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/106—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using two or more check valves
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Safety Valves (AREA)
  • Fluid-Driven Valves (AREA)
CA212,300A 1973-10-26 1974-10-25 Backflow prevention apparatus Expired CA1066164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA327,334A CA1090675A (en) 1973-10-26 1979-05-10 Backflow prevention apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US41017373A 1973-10-26 1973-10-26

Publications (1)

Publication Number Publication Date
CA1066164A true CA1066164A (en) 1979-11-13

Family

ID=23623549

Family Applications (1)

Application Number Title Priority Date Filing Date
CA212,300A Expired CA1066164A (en) 1973-10-26 1974-10-25 Backflow prevention apparatus

Country Status (8)

Country Link
JP (1) JPS5083819A (OSRAM)
BR (1) BR7408966D0 (OSRAM)
CA (1) CA1066164A (OSRAM)
DE (1) DE2450465A1 (OSRAM)
FR (2) FR2250939B1 (OSRAM)
GB (1) GB1490553A (OSRAM)
IL (1) IL45802A (OSRAM)
ZA (1) ZA746432B (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8037899B2 (en) 2008-05-08 2011-10-18 Shinshu University Backflow preventer
US8381764B2 (en) 2008-04-07 2013-02-26 Shinshu University Check valve
CN103697198A (zh) * 2013-12-24 2014-04-02 泉州市沪航阀门制造有限公司 压差原理倒流防止器的双室控制机构

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996962A (en) * 1976-03-19 1976-12-14 Rockwell International Corporation Backflow preventer and relief valve assembly
US4185656A (en) * 1977-12-13 1980-01-29 Braukmann Armaturen Ag Dual check valve structure
US4420010A (en) 1978-03-28 1983-12-13 Amtrol Inc. In-line back flow preventer
US4232704A (en) * 1978-03-28 1980-11-11 Amtrol Inc. In line back flow preventer
US4241752A (en) * 1978-05-30 1980-12-30 Watts Regulator Company Backflow preventer
US4276897A (en) 1978-06-23 1981-07-07 Griswold Controls Backflow prevention apparatus
US4231387A (en) * 1979-01-11 1980-11-04 Chas. M. Bailey Co., Inc. Backflow preventing valve
DE3322771A1 (de) * 1983-06-24 1985-01-03 Alfred Teves Gmbh, 6000 Frankfurt Ventilanordnung zur begrenzung des drucks in einem drucksystem
DE3742207A1 (de) * 1987-12-12 1989-06-22 Lang Apparatebau Gmbh Rueckflussverhinderer, insbesondere zum einbau in trinkwasserleitungen
DE3936962A1 (de) * 1989-11-07 1991-05-08 Waletzko Armaturen Gmbh Rueckflussverhinderer, insbesondere zum einbau in trinkwasserleitungen
US5226441A (en) * 1989-11-13 1993-07-13 Cmb Industries Backflow preventor with adjustable outflow direction
US5107888A (en) * 1989-11-13 1992-04-28 Cmb Industries, Inc. N-shaped backflow preventor
US5046525A (en) * 1990-06-15 1991-09-10 Ames Company, Inc. Differential loading fluid check valve
DE4309085C1 (de) * 1993-03-20 1995-01-05 Schubert & Salzer Ag Systemtrenner
JP3016993U (ja) * 1995-04-14 1995-10-17 株式会社タブチ 複式逆止型自在継ぎ手
DE29605420U1 (de) * 1996-03-23 1996-06-13 Festo Kg, 73734 Esslingen Schnellentlüftungsventil für pneumatische Anwendungen
DE10201626A1 (de) * 2002-01-16 2003-07-31 Wildfang Dieter Gmbh Sperrventil
DE202004016530U1 (de) * 2004-10-25 2006-03-02 Gebr. Kemper Gmbh & Co. Kg Metallwerke Rohrbelüfter und Absperrarmatur einer Wasserinstallation mit Rohrbelüfter
CN103742390B (zh) * 2013-11-28 2015-10-28 成都欧浦特控制阀门有限公司 一种设置有伸缩弹簧的气泵
PH12019502839B1 (en) 2018-03-12 2023-07-05 Ishizaki Co Ltd Check valve and reciprocating body for check valve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1710635A (en) * 1924-08-06 1929-04-23 Mortimer C Rosenfeld Valve
US3283772A (en) * 1964-02-04 1966-11-08 Donald G Griswold Backflow prevention device with improved pressure sensing means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8381764B2 (en) 2008-04-07 2013-02-26 Shinshu University Check valve
US8037899B2 (en) 2008-05-08 2011-10-18 Shinshu University Backflow preventer
CN103697198A (zh) * 2013-12-24 2014-04-02 泉州市沪航阀门制造有限公司 压差原理倒流防止器的双室控制机构

Also Published As

Publication number Publication date
AU7418174A (en) 1976-04-15
FR2257834A1 (OSRAM) 1975-08-08
IL45802A0 (en) 1975-03-13
BR7408966D0 (pt) 1975-09-23
JPS5083819A (OSRAM) 1975-07-07
DE2450465A1 (de) 1975-04-30
FR2257834B1 (OSRAM) 1979-10-05
IL45802A (en) 1977-05-31
GB1490553A (en) 1977-11-02
ZA746432B (en) 1976-06-30
FR2250939A1 (OSRAM) 1975-06-06
FR2250939B1 (OSRAM) 1978-08-11

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